01 7.3 misses till at operating temp - Ford Powerstroke Diesel Forum
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Old 02-21-2011, 06:03 PM
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01 7.3 misses till at operating temp

I have a 2001 F350 cc 4x4 with 7.3. 170,000 miles Here's my problem no matter what the outside temp is the engine has a miss until up to complete operating temp. Changed fuel filter and oil. Motor is stock best I can tell other than a Diy intake. Local shop says it needs all new injectors and idm. They also say buzz test won't help as it only checks the electronic part of the injector also said contribution test won't help cause pcm locks you out until it's at operating temp. I hate throwing parts at a problem to fix it. Thanks for any help
I posted this in the 911 section but no replies
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Old 03-01-2011, 08:33 AM
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Angry

HELP can't seem to figure this out
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Old 03-01-2011, 12:54 PM
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Are you getting a CEL? Did the shop retrieve any codes? Sometimes a bad connection in the UVCH (under valve cover harness) can cause issues. There is a method using an ohm meter on the connection/harness on the inboard side of each valve cover. Do a search for UVCH. Bump, and good luck.
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Old 03-01-2011, 03:16 PM
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No CEL. Shop pulled codes said there were some codes for the transfer case but nothing else
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Old 03-06-2011, 01:57 PM
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i have same problem. my only i did a contribution test and it said injectors 4 and 7 were at 60% so i just replaced both with no change. starts really hard even when its 40 degrees and runs like crap but when it reaches operating temp it runs mint. im thinkin its time for a rebuild as mine has 240k though
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Old 03-06-2011, 02:28 PM
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My mechanic friend said there is supposed to be some where you can add a resistor that fools the computer to think its warm and goes ahead and run the contribution test. I will get with him and see if we can figure out where. I think it came with the directions of his snap on computer diagnostic machine.
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Old 03-06-2011, 03:20 PM
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I need to figure out something on this thing can't afford to throw parts at her.
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Old 03-06-2011, 03:25 PM
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Have you checked your icp and ipr readings? A week icp pressure can case it to. Changed your oil regularly?
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Old 03-06-2011, 03:43 PM
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I've changed the oil 4 times since I bought it. Have only put 5,000 miles on her. ICP sensor is on the driver side head right. There was oil in that connector. no change in miss when I unplug it engine idles up for a sec the back down
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Old 03-06-2011, 04:07 PM
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Yep its on the d s head. If I was to bet I would bet that you onjectors are going bad or you hpop is getting week BUT with out hooking of up to a scanner and monitoring you readings that would be an expensive guess.
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